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Glass ionomer materials as a rechargeable fluoride-release system
S Hatibovic-Kofman1, G Koch, J Ekstrand
1Faculty of Dentistry, University of Western Ontario, London, Canada.
International Journal of Paediatric Dentistry
|June 1, 1997
Summary
Glass ionomers (GI) release fluoride (F), with recharge capacity varying by brand. XR Ionomer showed the highest fluoride release and recharge ability, while Zinomer showed the least, indicating GI
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Fluoride Chemistry
Background:
- Glass ionomers (GI) are known for their ability to release fluoride (F).
- The extent of fluoride release is influenced by the specific physical and chemical characteristics of the GI material.
- Understanding fluoride release and recharge is crucial for optimizing the clinical benefits of GI restorations.
Purpose of the Study:
- To evaluate and compare the fluoride release and fluoride recharge capacities of five different glass ionomer brands.
- To determine the correlation between the intrinsic fluoride content of GI materials and their release/recharge potential.
- To assess the effectiveness of different sodium fluoride (NaF) concentrations in recharging GI materials.
Main Methods:
- Five brands of glass ionomers (XR Ionomer, Vitrebond, GC Fuji Lining, Baseline VLC, Zinomer) were tested.
- Fluoride release was measured daily for 11 days after immersion in deionized water.
- Specimens were recharged with 0.02%, 0.04%, and 0.2% NaF solutions on multiple occasions, with subsequent daily fluoride release measurements up to day 32.
Main Results:
- A positive correlation was observed between the initial fluoride content in GI and its release rate.
- All five tested GI materials demonstrated fluoride recharge capabilities when exposed to NaF solutions.
- XR Ionomer exhibited significantly higher fluoride release and recharge capacity compared to other brands, whereas Zinomer showed the lowest.
- The 0.2% NaF solution was the most effective concentration for recharging the GI materials.
Conclusions:
- Glass ionomers function as effective fluoride reservoirs, providing a prolonged slow-release system for at least 32 days.
- Significant variations exist in fluoride release and recharge potential among different commercial GI brands.
- The findings suggest that GI materials can be effectively recharged, potentially enhancing their therapeutic benefits in clinical applications.